Automatic window lock



June 7, 1949. y Y E. A. BARBER ET Al. 2,472,395

AUTOMATIC WINDOW LOCK Edward 4.Banbef, Alwin E- Collins Harold C'.SyZveser QM wh.

June?, 1949. f E. A. BARBER ErAL 2,472,395-

AUTOMATIC WINDOW LOCK Filed March 12, 1946 2 Sheets-Sheet 2 *r 1 liInventors Z'dwaf'd A -Baf'et*, Alwxlnl). Collins &

Harold ('Sylveser 2o 2l 34II /'.9 4/ 2l Illl.

Patented June 7, 1949 AUTOMATIC WINDOW LOCK Edward A. Barber, Alwin D.Collins, and Harold C. Sylvester, St. Albans, Vt.

Application March 12, 1946, Serial No. 653,798

1 Claim. 1

This invention relates to :improvements in automatic locks for windows.

An object of the invention is to provide an improved automatic windowlock which will automatically and positively lock two window sashes whenthe same are brought to their normal closed position.

Another object of the invention is to provide an automatic springprojected lock for windows which will operate automatically when the twosashes of a window are brought to their normal closed position, andmeans for releasing the locking member from the locking grooves formedin the adjacent edges of the two cooperating window sashes.

A further object of the invention is to provide a concealedautomatically operated window locking mechanism which will be housed inthe space between the window frame and the adjacent side wall of a room,together with a pull operator for releasing the window lock after thesame has automatically locked the two window sashes.

Another object of the invention is to provide an improved automaticwindow lock which will be highly ecient in operation and relativelyinexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure 1 is a side elevation partly broken away and in section of awindow and frame showing the improved automatic window lock incorporatedtherein;

Figure 2 is a view taken on the line 2--2 of Figure l;

Figure 3 is a perspective view of the guard for the spring lock andlever;

Figure 4 is a perspective view of the springprojected bolt or lockmember;

Figure 5 is a sectional view taken on the line 5-5 of Figure 1;

Figure 6 is a perspective view of the corners of two cooperating glazedsashes showing the locking grooves and the reinforcing edging therefor;

Figure '7 is a View taken on the line 'I--T of Figure 1;

Figure 8 is a perspective view of the lock releasing yoke arm;

Figure 9 is a perspective view of the lock case, and

Figure l0 is a sectional view on the line lll- I0 of Figure 9.

Like characters of reference are used throughout the followingspecication and the accompanying drawings to designate correspondingparts.

In carrying out the invention, there is provided a window frame having aside member I and upper and lower members 2 and 3, respectively. Theframe will be set in a window opening 4 in a room wall 5, and a space 6will be left between the side member I of the window frame and theadjacent edge of the window opening for housing the concealed windowlock mechanism. The upper and lower glazed sashes l and 8 are slidablyreceived in the window frame, and have the usual sash weights 9 and Il)connected therewith by the sash cords II and I2 extending over thepulleys I3 and I4.

The lower corner of the upper sash 'I and the upper corner of the lowersash 8 are notched out to form the aligning locking grooves I5 and I6which cooperate with the metal reinforcing edging plates I'I and I8secured to the outer side edges of said sash, as clearly illustrated inFigure 6 of the drawings. A substantially rectangular aperture is formedthrough the side frame member I and receives the rectangular metal lockcase I9 which is formed with the outwardly extending attaching ears 20,and screws 2| are secured in apertures 22 in said ears to fasten them tothe side frame member to hold said case in position. The case I9 will bedisposed in horizontal alignment with the locking grooves I5 and I6 inthe window sashes 'l and 8.

A guard member for the spring lock and lever is substantially U-shapedin form and is provided with the upper and lower arms 23 and 24 andvertically extending connecting arm 25 which is apertured at 26. The arm23 is twisted as at 2l, and laterally extending ends 28 and 29 areformed on the inner ends of the arms 23 and 24, said end 28 extendinglaterally along the side frame member I, while the end 29 extendsdownwardly along said side frame member. The ends 28 and 29 areapertured as at 30 and 3| to receive the screws 32 extendingtherethrough and into the said side frame member I, said guard memberoverlying the lock case I9.

A U-shape metal locking bolt 33 is provided and is formed with a bracingplate 34 extending between its arms, said plate supporting the outwardlyextending guide rod 35, which is adapted to be slidably mounted throughthe aperture 26 in the guard member arm 25, and supports the coil spring36 about it, extending between the plate 34 and said arm 25 forresiliently projecting the locking bolt 33 through the case I9 and intothe locking grooves I and I6 in the window sashes 1 and 8.

The lock releasing lever 31 is formed with the integrally formeddepending yoke 38, the ends of which are apertured as at 39 and 40, andare adapted to be connected by means of the pins or screws 4I throughthe apertures 42 and 43 formed through the ends of the U-shape lockingbolt 33. A pin or fastener 44 is extended through the slot 45 in thelever 31 and through the aperture 46 through the twisted arm 23 on thesaid guard member, whereby movement of the upper end of the lever 31towards the side frame member I will release the bolt 33 from thelocking grooves I5 and I6 in the window sashes 1 and 8, against thetension of the coil spring 36, and when released, the coil spring willautomatically project the bolt 33 into locking engagement with thealigned locking grooves I5 and I6. The upper end of the lever 31 isapertured at 41 to receive a flexible cord 48 which will extend inwardlythrough the aperture 49 through the side frame member I, and over thepulley 50 set in the upper cross frame member 2 to extend downwardly infront of the glazed upper sash 1. A hand engaging ring or knob 5I willbe secured to the terminal end of the cord 43, so that when it isdesired to unlock the sashes 1 and 8 for opening the same, the ring 5Iwill be pulled downwardly thereby pulling down on the cord 48 to movethe lock releasing lever 31 towards the side frame member I to releasethe locking bolt33 from the aligned locking grooves I5 and I6 in theupper and lower sashes 1 and 8, whereupon the sashes may be eitherraisedor lowered. It will be understood that when bothsashes are fully closed,the locking bolt 33 will be automatically spring projected into lockedposition in the aligned locking grooves I5 and I6 in the Window sashes 1and 8.

While the preferred embodiment of the instant invention has beenillustrated and described, it will be understood that it is not intendedto limit the scope of the invention thereto, as many minor changes indetail of construction may be resorted to without departure from thespirit of the invention.

Having thus described our invention what we claim as new and desire tosecure by Letters Patent of the United States is:

A fastener for vertically slidable sashes comprising a lock case adaptedto be disposed through the side of a window frame opposite thetransverse meeting rails of a pair of slidable sashes when in closedposition, a guard bracket secured to the side of said window frameoverlying said lock case and formed with an aperture, an elongatedoperating lever pivotally attached to said guard bracket and having ayoke formed on its lower extremity, a locking bolt slidably disposed insaid lock case and pivotally connected between the arms of said yoke onthe operating lever and having a stem slidably mounted in the aperturein said guard bracket, a resilient tensioning spring disposed about saidstem for normally urging said locking bolt to its locked position, saidsashes being formed with alignable coacting locking grooves forreceiving the locking bolt for holdingthe sashes locked in closedposition, a pulley mounted on said window frame, and a flexible lockreleasing cord disposed over said pulley and secured to the upperextremity of the operating lever.

EDWARD A. BARBER. ALWIN D. COLLINS. HAROLD C. SYLVESTER.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 514,035 Rhoads Feb. 6, 1894926,077 Reinhart June 22, 1909 1,104,460 Wesolowski July 21, 19141,113,667 Mahaj Oct. 13, 1914 1,156,632 Schoenherr Oct. 12, 1915

